The Rocket Launcher and its ammo is spread all over the place. One is in a garage, where John will take a rest due to being out of ammo. Another can be found infront of a café. It's a little dark, so keep looking.

Overall, it was quite a solid experience. I was impressed by the amount of effects and attention to detail. The sprinting animation for every weapon, melee attacks, the groomy atmosphere and even the Skype call in the Observatory.
The effects are always fitting, explosions feel powerful and look great. However, my only gripe about the effects are the portal storms. They feel WAAAAY too close to the player and make them seem tiny and boring. The last portal, through which the Combine invade, is just kickass. That portion was really well delivered.
The voice acting can get cheesy at times, but is fun to listen to.

It has flaws, however:
The gameplay feels quite rubbish at times. At the beginning, where you get the pistol, it was almost impossible to me at first. I got the gun, fired everything I had at the poison zombie and he didn't die. He then cornered and raped me. I just wish the mod was a little easier during firefights and the puzzles should be easier to understand. I literally spent half an hour running around that damn mansion to find that goddamn key.

Overall, this mod is a must download. While the action and puzzles can get a little annoying at times, the amazing amount of detail and lovely effects simply overshadow the flaws and allow for a great experience.